The amino acid which plays a central role in nitrogen metabolism is/are:

Nitrate reductase enzyme is responsible for the formation of

Amino acids are mostly synthesised from

Complete the equation.
$\alpha -$ Ketoglutaric acid $+ NH_4^+ +$ ...$A$.... $\xrightarrow[\text{Dehydrogenase}]{\text{glutamate}} $ ...$B$... $+ H_2O + NADP$
Identify $A$ and $B$.

Give differences: Reductive Amination and Transamination.

In reductive amination,which of the following reacts with ammonia?